Masturbation when done in excess can cause drastic changes in brain and body chemistry. Masturbating too much can over-stimulate acetylcholine/parasympathetic nervous functions and disrupt the liver's release of enzymes that synthesize neurotransmitters acetylcholine, dopamine, and serotonin. Additionally, the liver's ability to release enzymes that aid in hormone production is affected. As a result, the brain and adrenal glands produce too much dopamine, nor epinephrine, epinephrine, and other hormones and neural transmitters.
Symptoms are distressing liver and nervous system functions; include youthful impotence/erectile dysfunction (including a soft or weak erection) and seminal leakage. Seminal leakage can cause sperm to ooze or leak out of the with no accompanying erection. Both semen leakage and youthful impotence are embarrassing, uncomfortable, and signs of exhaustion.
Semen leakage is a sign that the parasympathetic nerve, which keeps the ejaculation valve shut and holds the erection, is weakening as a result of over masturbation. With a weakened nerve, maintaining an erection is a problem.